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  2. Cheval mirror - Wikipedia

    en.wikipedia.org/wiki/Cheval_mirror

    Cheval glass (USA, c. 1815) The cheval glass (also cheval mirror, psyche mirror, horse dressing glass, swing glass) is a free-standing large mirror, usually with a tilt mechanism, that provided a complete reflection from head to foot (thus also the full-length mirror name).

  3. File:Primary Mirror Size Comparison Between Webb and Hubble ...

    en.wikipedia.org/wiki/File:Primary_Mirror_Size...

    Original file (WebM audio/video file, VP9, length 24 s, 2,560 × 1,440 pixels, 3.66 Mbps overall, file size: 10.37 MB) This is a file from the Wikimedia Commons . Information from its description page there is shown below.

  4. Primary mirror - Wikipedia

    en.wikipedia.org/wiki/Primary_mirror

    The largest optical telescope in the world as of 2009 to use a non-segmented single-mirror as its primary mirror is the 8.2 m (27 ft) Subaru telescope of the National Astronomical Observatory of Japan, located in Mauna Kea Observatory on Hawaii since 1997; [3] [better source needed] however, this is not the largest diameter single mirror in a telescope, the U.S./German/Italian Large Binocular ...

  5. Mirror - Wikipedia

    en.wikipedia.org/wiki/Mirror

    A mirror reflecting the image of a vase A first-surface mirror coated with aluminium and enhanced with dielectric coatings. The angle of the incident light (represented by both the light in the mirror and the shadow behind it) exactly matches the angle of reflection (the reflected light shining on the table). 4.5-metre (15 ft)-tall acoustic mirror near Kilnsea Grange, East Yorkshire, UK, from ...

  6. Focal length - Wikipedia

    en.wikipedia.org/wiki/Focal_length

    The focal point F and focal length f of a positive (convex) lens, a negative (concave) lens, a concave mirror, and a convex mirror.. The focal length of an optical system is a measure of how strongly the system converges or diverges light; it is the inverse of the system's optical power.

  7. 135 film - Wikipedia

    en.wikipedia.org/wiki/135_film

    The 24×36 mm format is common to higher-end digital image sensors, where it is typically referred to as full-frame format. On 135 film, the typical cameras produce a frame where the longer dimension of the 24×36 mm frame runs parallel to the length of the film. The perforation size and pitch are according to the standard specification KS-1870 ...